body,html
  line-height 1
  font-weight 200
  font-family 'PingFang SC','STHeitiSC-Light','Helvetice-Light',arial,sans-serif
.clearfix
  display inline-block
  &:after
  	display block
  	content '.'
  	height 0
  	line-height 0
  	clear both
  	visibility hidden

@media (-webkit-min-device-pixel-ratio: 1.5),(min-device-pixel-ratio:1.5)
  .border-bottom
    &::after
      -webkit-transform: scaleY(0.7)
      transfrom:scaleY(0.7)
@media (-webkit-min-device-pixel-ratio: 2),(min-device-pixel-ratio:2)
  .border-bottom
    &::after
      -webkit-transform: scaleY(0.5)
      transfrom:scaleY(0.5)    
      
@media (-webkit-min-device-pixel-ratio: 1.5),(min-device-pixel-ratio:1.5)
  .border-right
    &::after
      -webkit-transform: scaleX(0.7)
      transfrom:scaleX(0.7)
@media (-webkit-min-device-pixel-ratio: 2),(min-device-pixel-ratio:2)
  .border-right
    &::after
      -webkit-transform: scaleX(0.5)
      transfrom:scaleX(0.5)